The dry powder fire extinguisher is filled with a dry powder fire - extinguishing agent called ammonium phosphate salt, which is very effective in fire - fighting. Therefore, the dry powder fire extinguisher has a wide range of applications. Do you know what the red pointer on a dry powder fire extinguisher means? Here is an introduction for you.

The red pointer is actually a warning sign to remind users that the fire extinguisher needs to be refilled or inspected. Once the pointer on the pressure gauge of the dry powder fire extinguisher points to the red area, it means that the pressure of the dry powder in the fire extinguisher is too low to spray out the dry powder, so the fire extinguisher loses its fire - fighting function. Therefore, corresponding maintenance is required to ensure its reliability and effectiveness. In this case, you can only go to a regular fire - fighting equipment store to refill the dry powder and make the pointer of the pressure gauge return to the normal position to ensure that it is in a usable state. You can also contact professional maintenance personnel or relevant departments for handling.